Hourglass - Hourglass is the most advanced simple countdown timer for Windows.
Timer Tab - Online countdown timer, alarm clock, and stopwatch.
Hologram - Frontend Development and Design
Gestimer - For those little reminders during the day
iTunes - Media player, media library, Internet radio broadcaster, and iPhone device management application
Online Stopwatch - Online Stopwatch is free to use online tool that allows you to keep track of the important events and tasks that you are performing.